Help with TraversalSpec

[ReazBaksh]

Hello
I trying to retrieve data from a standlone esxi host using c# and the vmware.vim.dll. 
I am trying to do this using the Property Controller along with the TraversalSpec.  The following code is what I have but when I run it I get the following:

"Additional information: A specified parameter was not correct: undefined TraversalSpec name" at the 
ObjectContent[] objs =pCollector.RetrieveProperties(pFss);

Without the TraversalSpec section I can get the maxCollector value if I change the "ipAddress" to "maxCollector" but I'm trying to get the ipAddress that is within the latestEvent property.
This is just a test to see that it works.  So far I cant get the TraversalSpec part to work.

Any help would be appreciated.

public void listTasks(VimClientImpl client)

        {

    ManagedObjectReference objRef = new ManagedObjectReference();

            objRef.Type = "ServiceInstance";

            objRef.Value = "ServiceInstance";

            ServiceContent sc = client.ServiceContent;

            ManagedObjectReference pcMOR = sc.PropertyCollector;

            ManagedObjectReference rootFolderMOR = sc.EventManager;

            PropertySpec pSpec = new PropertySpec();

            pSpec.All = false;

            pSpec.Type = rootFolderMOR.Type;

            pSpec.PathSet = (new String[] { "ipAddress" });

            ObjectSpec oSpec = new ObjectSpec();

            oSpec.Obj = rootFolderMOR;

            TraversalSpec folderToChild = new TraversalSpec();

            folderToChild.Name = "folderToChild";

            folderToChild.Type = rootFolderMOR.Type;

            folderToChild.Path = "latestEvent";

            folderToChild.Skip = false;

            SelectionSpec foldersSSpec = new SelectionSpec();

            foldersSSpec.Name = "folderToChild";

            SelectionSpec[] ftcArr = new SelectionSpec[] { foldersSSpec };

            oSpec.SelectSet = ftcArr;

            PropertyFilterSpec[] pFss = new PropertyFilterSpec[1];

            pFss[0] = new PropertyFilterSpec();

            pFss[0].ObjectSet = (new ObjectSpec[] { oSpec });

            pFss[0].PropSet = (new PropertySpec[] { pSpec });

            PropertyCollector pCollector = new PropertyCollector(client, pcMOR);

            //fails at this point

            ObjectContent[] objs =pCollector.RetrieveProperties(pFss);

            if (objs!=null&&objs[0]!=null)

            {

                for (int i =0; i<objs.Length;i++)

                {

                    DynamicProperty[] dps = objs[i].PropSet;

                    foreach (DynamicProperty d in dps)

                    {

                        listview1.Items.Add(d.Val);

                    }

                }    

            }

         }

Thanks

public void listTasks(VimClientImpl client)

        {

    ManagedObjectReference objRef = new ManagedObjectReference();

            objRef.Type = "ServiceInstance";

            objRef.Value = "ServiceInstance";

            ServiceContent sc = client.ServiceContent;

            ManagedObjectReference pcMOR = sc.PropertyCollector;

            ManagedObjectReference rootFolderMOR = sc.EventManager;

            PropertySpec pSpec = new PropertySpec();

            pSpec.All = false;

            pSpec.Type = rootFolderMOR.Type;

            pSpec.PathSet = (new String[] { "ipAddress" });

            ObjectSpec oSpec = new ObjectSpec();

            oSpec.Obj = rootFolderMOR;

            TraversalSpec folderToChild = new TraversalSpec();

            folderToChild.Name = "folderToChild";

            folderToChild.Type = rootFolderMOR.Type;

            folderToChild.Path = "latestEvent";

            folderToChild.Skip = false;

            SelectionSpec foldersSSpec = new SelectionSpec();

            foldersSSpec.Name = "folderToChild";

            SelectionSpec[] ftcArr = new SelectionSpec[] { foldersSSpec };

            oSpec.SelectSet = ftcArr;

            PropertyFilterSpec[] pFss = new PropertyFilterSpec[1];

            pFss[0] = new PropertyFilterSpec();

            pFss[0].ObjectSet = (new ObjectSpec[] { oSpec });

            pFss[0].PropSet = (new PropertySpec[] { pSpec });

            PropertyCollector pCollector = new PropertyCollector(client, pcMOR);

            ObjectContent[] objs =pCollector.RetrieveProperties(pFss);

            if (objs!=null&&objs[0]!=null)

            {

                for (int i =0; i<objs.Length;i++)

                {

                    DynamicProperty[] dps = objs[i].PropSet;

                    foreach (DynamicProperty d in dps)

                    {

                        listview1.Items.Add(d.Val);

                    }

                }    

            }

         }